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Applied Physics Letters / Volume 97 / Issue 5 / DIELECTRICS AND FERROELECTRICITY

Appl. Phys. Lett. 97, 052901 (2010); http://dx.doi.org/10.1063/1.3474610 (3 pages)

Strontium-induced ferroelectriclike relaxor behavior in Bi-based pyrochlores

Huiling Du and Xiang Shi

College of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China

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(Received 5 June 2010; accepted 11 July 2010; published online 2 August 2010)

The dielectric properties of stoichiometric dense ceramics (Bi1.5Zn0.5−xSrx)(Ti1.5Nb0.5)O7 (BZSTN, x = 0–0.5) have been investigated as a function of temperature and frequency. A significant relaxation behavior at about 250 °C is induced when moderate Sr2+ is substituted with Zn2+ in Bi1.5Zn0.5Ti1.5Nb0.5O7 (BZTN) ceramics. The observation of hysteretic behavior in the P versus E curves shows the existence of a polar state. The ferroelectriclike relaxor behavior arises mainly from the dynamic response of the micropolar clusters, which exist in the off-center ions doped paraelectric. The ultrahigh permittivity of 245 at ambient temperature could be very promising for integrated capacitors and microwave resonators.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

bismuth compounds, ferroelectric ceramics, hysteresis, niobium compounds, permittivity, relaxor ferroelectrics, strontium compounds, titanium compounds, zinc compounds

PACS

  • 77.80.Jk

    Relaxor ferroelectrics

  • 77.84.-s

    Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials

  • 77.55.F-

    High-permittivity capacitive films

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3474610

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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